Buggy code:
public class ClassScope extends Scope { public TypeDeclaration referenceContext ; private TypeReference superTypeReference ; private static final char [ ] IncompleteHierarchy = new char [ ] { 'h' , 'a' , 's' , '<seq2seq4repair_space>' , 'i' , 'n' , 'c' , 'o' , 'n' , 's' , 'i' , 's' , 't' , 'e' , 'n' , 't' , '<seq2seq4repair_space>' , 'h' , 'i' , 'e' , 'r' , 'a' , 'r' , 'c' , 'h' , 'y' } ; public ClassScope ( Scope parent , TypeDeclaration context ) { } void buildAnonymousTypeBinding ( SourceTypeBinding enclosingType , ReferenceBinding supertype ) { } private void buildFields ( ) { } void buildFieldsAndMethods ( ) { } private LocalTypeBinding buildLocalType ( SourceTypeBinding enclosingType , PackageBinding packageBinding ) { } void buildLocalTypeBinding ( SourceTypeBinding enclosingType ) { } private void buildMemberTypes ( AccessRestriction accessRestriction ) { } private void buildMethods ( ) { } SourceTypeBinding buildType ( SourceTypeBinding enclosingType , PackageBinding packageBinding , AccessRestriction accessRestriction ) { } private void buildTypeVariables ( ) { } private void checkAndSetModifiers ( ) { } private void checkAndSetModifiersForField ( FieldBinding fieldBinding , FieldDeclaration fieldDecl ) { int modifiers = fieldBinding . modifiers ; if ( ( modifiers & ( AccAlternateModifierProblem ) ) != 0 ) problemReporter ( ) . duplicateModifierForField ( fieldBinding . declaringClass , fieldDecl ) ; <START_BUG> if ( fieldBinding . declaringClass . isInterface ( ) ) { <END_BUG> int expectedValue = ( ( AccPublic ) | ( AccStatic ) ) | ( AccFinal ) ; modifiers |= expectedValue ; if ( ( modifiers & ( AccJustFlag ) ) != expectedValue ) problemReporter ( ) . illegalModifierForInterfaceField ( fieldBinding . declaringClass , fieldDecl ) ; fieldBinding . modifiers = modifiers ; return ; } else if ( ( fieldDecl . getKind ( ) ) == ( AbstractVariableDeclaration . ENUM_CONSTANT ) ) { if ( ( modifiers & ( AccJustFlag ) ) != 0 ) problemReporter ( ) . illegalModifierForEnumConstant ( fieldBinding . declaringClass , fieldDecl ) ; int implicitValue = ( ( ( AccPublic ) | ( AccStatic ) ) | ( AccFinal ) ) | ( AccEnum ) ; fieldBinding . modifiers |= implicitValue ; return ; } int realModifiers = modifiers & ( AccJustFlag ) ; int unexpectedModifiers = ~ ( ( ( ( ( ( ( AccPublic ) | ( AccPrivate ) ) | ( AccProtected ) ) | ( AccFinal ) ) | ( AccStatic ) ) | ( AccTransient ) ) | ( AccVolatile ) ) ; if ( ( realModifiers & unexpectedModifiers ) != 0 ) problemReporter ( ) . illegalModifierForField ( fieldBinding . declaringClass , fieldDecl ) ; int accessorBits = realModifiers & ( ( ( AccPublic ) | ( AccProtected ) ) | ( AccPrivate ) ) ; if ( ( accessorBits & ( accessorBits - 1 ) ) > 1 ) { problemReporter ( ) . illegalVisibilityModifierCombinationForField ( fieldBinding . declaringClass , fieldDecl ) ; if ( ( accessorBits & ( AccPublic ) ) != 0 ) { if ( ( accessorBits & ( AccProtected ) ) != 0 ) modifiers &= ~ ( AccProtected ) ; if ( ( accessorBits & ( AccPrivate ) ) != 0 ) modifiers &= ~ ( AccPrivate ) ; } if ( ( accessorBits & ( AccProtected ) ) != 0 ) if ( ( accessorBits & ( AccPrivate ) ) != 0 ) modifiers &= ~ ( AccPrivate ) ; } if ( ( realModifiers & ( ( AccFinal ) | ( AccVolatile ) ) ) == ( ( AccFinal ) | ( AccVolatile ) ) ) problemReporter ( ) . illegalModifierCombinationFinalVolatileForField ( fieldBinding . declaringClass , fieldDecl ) ; if ( ( ( fieldDecl . initialization ) == null ) && ( ( modifiers & ( AccFinal ) ) != 0 ) ) { modifiers |= AccBlankFinal ; } fieldBinding . modifiers = modifiers ; } private void checkForInheritedMemberTypes ( SourceTypeBinding sourceType ) { } private void checkParameterizedTypeBounds ( ) { } private void connectMemberTypes ( ) { } private boolean connectSuperclass ( ) { } private boolean connectEnumSuperclass ( ) { } private boolean connectSuperInterfaces ( ) { } void connectTypeHierarchy ( ) { } private void connectTypeHierarchyWithoutMembers ( ) { } public boolean detectAnnotationCycle ( TypeBinding sourceType , TypeBinding annotationElementType , TypeReference reference ) { } public boolean detectHierarchyCycle ( TypeBinding superType , TypeReference reference , TypeBinding [ ] argTypes ) { } private boolean detectHierarchyCycle ( SourceTypeBinding sourceType , ReferenceBinding superType , TypeReference reference ) { } private ReferenceBinding findAmbiguousInterface ( ReferenceBinding newInterface , ReferenceBinding currentType ) { } private ReferenceBinding findSupertype ( TypeReference typeReference ) { } public ProblemReporter problemReporter ( ) { } public TypeDeclaration referenceType ( ) { } public String toString ( ) { } }

Fix:
if ( ( ( fieldBinding . declaringClass . modifiers ) & ( AccInterface ) ) != 0 ) {